added level based logging using uber/zap

utils/logger.go

@@ -0,0 +1,20 @@
+package utils
+
+import (
+	"go.uber.org/zap"
+	"log"
+)
+
+var logger *zap.Logger
+
+func InitializeLogger() {
+	var init_err error
+	logger, init_err = zap.NewProduction()
+	if init_err != nil {
+		log.Fatal("failed to initialize logger")
+	}
+}
+
+func GetLogger() *zap.Logger {
+	return logger
+}